The goal of sex-change is to maximize genetic fitness. This process of sex-change seen is representative of a developed strategy to increase potential genetic fitness.
Most of the genetic work that deals with sex-change has been done at a theoretical basis (see Leigh et al., 1976). Such theory has included formulas and equations to predict what situations would be necessary for sex-change to evolve.
Aside from the Bkm Marker, and other satellite sequences, no major genetic work has been done, explaining any of the causative nature of the DNA involved. Clearly, this is an area for future work.
A trumpetfish, Aulostomus maculatus, N.GBR. Photo by Aaron Rice.
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